中国畜牧兽医

• 动物营养与饲料科学 • 上一篇    下一篇

麦洼牦牛全泌乳期乳中矿物质元素变化规律研究

刘益丽12,江明锋23,江伟华12,林忠荔12,蔡自建3,张林12,朱小翌12,任洪辉23,李建波23   

  1. 1.西南民族大学青藏高原研究院,四川成都  6100412.动物遗传育种学国家民委—教育部重点实验室,四川成都  6100413.西南民族大学生命科学与技术学院,四川成都  610041

  • 收稿日期:2013-12-03 出版日期:2014-06-20 发布日期:2014-07-24
  • 通讯作者: 江明锋(1971—),男,四川人,博士,教授。E-mail:mingfengjiang@vip.sina.com
  • 作者简介:刘益丽(1989—),女,四川人,硕士生,研究方向:遗传学。
  • 基金资助:

    自然科学基金(31172198)2011年人社部留学归国项目(2011-2);西南民族大学研究生“创新型科研项目”(CX2014SZ120

Study on Changes in Mineral Elements Contents of Yak Milk during the Lactation Cycle

LIU Yi-li1,2,JIANG Ming-feng2,3,JIANG Wei-hua1,2,LIN Zhong-li1,2,CAI Zi-jian3,ZHANG Lin1,2,ZHU Xiao-yi1,2,REN Hong-hui2,3,LI Jian-bo2,3   

  1. 1.The Qinghai-tibet Plateau InstituteSouthwest University for NationalitiesChengdu 610041China2.Key Laboratory of Animal Genetics & BreedingState Ethnic Affairs Commission and Ministry of EducationChengdu 610041China3.College of Life Science and TechnologySouthwest University for NationalitiesChengdu 610041China

  • Received:2013-12-03 Online:2014-06-20 Published:2014-07-24

摘要: 为阐明牦牛乳中矿物质元素含量在全泌乳期的变化规律,试验采集了四川省龙日种畜场麦洼牦牛产犊当天到180 d(即0~180 d)内共12个时间点的乳样。采用微波消解法处理乳样,用电感耦合等离子体发射光谱仪(ICP-OES)测定牦牛乳中14种矿物质元素,分别为4种大量元素(钾(K)、钙(Ca)、镁(Mg)、磷(P))和10种微量元素(硼(B)、钡(Ba)、镉(Cd)、钴(Co)、铜(Cu)、钼(Mo)、镍(Ni)、钛(Ti)、锌(Zn)、锰(Mn)),并以牦牛产犊后30 d采集的乳样数据为基准进行统计分析。结果显示,麦洼牦牛初乳中K、Ca、Mg、P 4种大量元素含量较高。与30 d的常乳含量相比,K的含量在0 d时差异极显著(P<0.01),在120 d时差异显著(P<0.05);Ca的含量在5 d时差异显著(P<0.05);Mg的含量在180 d时差异显著(P<0.05);P的含量变化差异不显著(P>0.05)。在0~180 d泌乳期内微量元素随泌乳期的变化也较明显,与30 d的常乳含量相比,Ba的含量在0和1 d时差异极显著(P<0.01),在2、3、4、5和180 d时差异显著(P<0.05);Mo、Ni、Zn的含量在180 d时差异显著(P<0.05);B、Cd、Cu、Ti、Mn的含量随泌乳期变化差异均不显著(P>0.05)。综上所述,牦牛乳中K、Ca、Mg、Ba、Mo、Ni、Zn的含量随泌乳期的变化差异显著(P<0.05),P、B、Cd、Cu、Ti、Mn的含量变化不显著(P>0.05);整体上看,K、Mg、P、Ba、Zn的含量变化呈先降低后增加的趋势,而Ca的含量呈现出先增加后降低的趋势。

关键词:

牦牛乳; 矿物质元素; 微波消解; ICPmso-bidi-font-family: 宋体" lang="EN-US">-OES

Abstract: To clarify the changes of mineral elements of yak milk during the lactation cycle,milk samples at 12 time points from 0 to 180 d during the lactation cycle were collected from Maiwa yak at Longri livestock breeding station in Sichuan province. After milk samples were prepared using microwave digestion,fourteen elements were analyzed by the ICP-OES for four macro elements (potassium,calcium,magnesium,phosphorus) and ten micro elements (boron,barium,cadmium,cobalt,copper,molybdenum,nickel,titanium,zinc,manganese).The statistical analysis based on the statistics data from the samples on day 30 was proceeded. The results showed that the concentrations of K,Ca,Mg and P in Maiwa yak colostrum were higher.The concentrations of K on day 0 (P<0.01),120 (P<0.05),Ca on day 5 (P<0.05),Mg on day 180 (P<0.05) had significant differences as compared with that of mineral elements on day 30, but no significant difference was observed in the concentration of P (P>0.05) during the lactation cycle.The results also suggested that the concentrations of trace elements were significantly affected by the lactation cycle. The concentrations of Ba on day 0 and 1 (P<0.01),2,3,4,5 and 180 (P<0.05),Mo on day 180(P<0.05),Ni on day 180(P<0.05),Zn on day 180(P<0.05) had significant differences as compared with that of mineral elements on day 30,but there were no significant differences on B,Cd,Cu,Ti,Mn during the lactation cycle.In conclusion,the concentrations of K,Ca,Mg,Ba,Mo,Ni,Zn had significant differences during the lactation cycle (P<0.05),but no significant differences were observed in the concentrations of P,B,Cd,Cu,Ti,Mn (P>0.05).Overall,the concentrations of K,Mg,P,Ba,Zn were all firstly decreasing and then increasing,while Ca content was firstly increasing and then decreasing.

Key words: yak milk; mineral elements; microwave digestion; ICP-OES